diff --git a/Tools/scripts/build_all_px4.sh b/Tools/scripts/build_all_px4.sh
index e503a38f12..587c623b8b 100755
--- a/Tools/scripts/build_all_px4.sh
+++ b/Tools/scripts/build_all_px4.sh
@@ -8,21 +8,24 @@
 set -e
 set -x
 
+for d in ArduPlane ArduCopter APMrover2; do
+    pushd $d
+    make px4-clean
+    popd
+done
+
 echo "Testing ArduPlane build"
 pushd ArduPlane
-make px4-clean
 make px4
 popd
 
 echo "Testing ArduCopter build"
 pushd ArduCopter
-make px4-clean
 make px4
 popd
 
 echo "Testing APMrover2 build"
 pushd APMrover2
-make px4-clean
 make px4
 popd